Discussion:
IBM Basic Counter Unit
(too old to reply)
Mike Kerford-Byrnes
2018-08-13 10:04:49 UTC
Permalink
In an idle moment a few months ago, I remembered using the above on a 360/50. It looked like an 029 in intensive care, with a lot of cables emanating from the box, all connected to various points in the processor.

I doodled on Google and found a reference which included a picture (sorry - image!) and a reference to the IBM model number (which I thought was 29??).

I now have a desire to revisit that picture/reference as part of a history project on which I am working. But I cannot for the life of me find any reference to it . I spent a large part of Friday with Google and Bing, trying every combination of IBM, Basic, Counter, and unit, as well as the 29nn values. But --- nothing.

I suspect I have missed the 'magic' Google phrase which would reveal all - several hours of frustrating Googling can induce typing "inconsistencies", so I am appealing to this forum for anything that can help me to track it down.

Hopefully thanking in advance.

Mike Kerford-Byrnes

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to ***@listserv.ua.edu with the message: INFO IBM-MAIN
Pierre Legault
2018-08-14 18:37:17 UTC
Permalink
http://bitsavers.org/pdf/ibm/serviceForConsultants/Service_For_Consultants_198312_Complete/13_Machine_Preface.pdf :

2989-001 (RPQ) Tape Control
2989-004 (RPQ)
2989-005 (RPQ)
2989-006 (RPQ)
2989-010 (RPQ) Real Time Recorder
2989-011 (RPQ) Basic Counter Unit
2989-014 (RPQ)
Tom Russell
2018-08-15 15:11:46 UTC
Permalink
Post by Mike Kerford-Byrnes
In an idle moment a few months ago, I remembered using the above on a 360/50. It looked like an 029 in intensive care, with a lot of cables emanating from the box, all connected to various points in the processor.
Mike Kerford-Byrnes
Are you sure you aren't talking about the Systems Measurement Instrument (SMI)? That was the only IBM hardware monitor available during the S360 era as far as I know. It had a number of probes that you attached to various points in the s/360. The SMI had a plug panel board that you wired up to get the data from the probes into accumulators. Once the newer s/370 boxes got a service processor, the hardware instrumentation became part of the service processor, and the SMI became obsolete. The service processor based instrumentation remained as an IBM lab tool until fairly recently when it was made available to customers, and documented.

G. Tom Russell
“Stay calm. Be brave. Wait for the signs” — Jasper FriendlyBear
“… and remember to leave good news alone.” — Gracie HeavyHand

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to ***@listserv.ua.edu with the message: INFO IBM-MAIN
William Donzelli
2018-08-15 19:21:50 UTC
Permalink
Post by Tom Russell
Are you sure you aren't talking about the Systems Measurement Instrument (SMI)? That was the only IBM hardware monitor available during the S360 era as far as I know. It had a number of probes that you attached to various points in the s/360. The SMI had a plug panel board that you wired up to get the data from the probes into accumulators. Once the newer s/370 boxes got a service processor, the hardware instrumentation became part of the service processor, and the SMI became obsolete. The service processor based instrumentation remained as an IBM lab tool until fairly recently when it was made available to customers, and documented.
I think the 2955 FE/DAU (Field Engineering / Data Access Unit) was
around for the very tail end of the S/360 era.

--
Will

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to ***@listserv.ua.edu with the message: INFO IBM-MAIN
Edward Finnell
2018-08-15 20:14:59 UTC
Permalink
I think we got the 3rd 360/50 produced. It wouldn't come up and they escalated up the chain all the way to Armonk. Some gruff old 'specialist'-with stogie was flown in. We had a couple of storage oscilloscopes and his basic diagnosis was that it hadn't been 'timed'. So he set about to sync the clock cycles and about half way thru an SE says "I found the bug!"(Similar to Grace Hopper's moth). Big ol cockroach crawled across the side panel. Both were escorted from the room. 


In a message dated 8/15/2018 2:23:39 PM Central Standard Time, ***@GMAIL.COM writes:

 
I think the 2955 FE/DAU (Field Engineering / Data Access Unit) was

around for the very tail end of the S/360 era.

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to ***@listserv.ua.edu with the message: INFO IBM-MAIN
Loading...